a : a broad thin plate that forms the lateral part of the pterygoid process and gives attachment to the lateral pterygoid muscle on its lateral surface and to the medial pterygoid muscle on its medial surface.

Where is the Pterygoid plate?

Two pairs of bony plates, the pterygoid processes, arise from the base of each alisphenoid bone. The outer plates are nearly horizontal in position. They extend from the posterior end of the maxillary bone caudad and laterad to the lateral surface of the tympanic bulla.

What is the function of the pterygoid plate?

The primary function of the pterygoid muscles is to produce movements of the mandible at the temporomandibular joint. Both muscles are innervated by branches of the mandibular division of the trigeminal nerve (CN V3), and receive their blood supply from branches of the maxillary artery.

What does pterygoid mean?

(Entry 1 of 2) : of, relating to, or lying in the region of the inferior part of the sphenoid bone of the vertebrate skull.

What is a Pterygoid plate fracture?

Importance: Classically, pterygoid plate fractures have been associated with fractures of the mid-face and skull base. When isolated pterygoid plate fractures are identified on imaging that only extends to the level of the skull base, other related facial fractures may be missed.

Infratemporal Fossa LO - Pterygoid Plates

23 related questions found

What is medial pterygoid?

The medial pterygoid muscle, a major elevator of the jaw is a square-shaped masticatory muscle, located on the medial aspect of the lower jaw bilaterally. It is also known as internal pterygoid muscle. This muscle lies medial to the lateral pterygoid muscle.

What is Pterygoid fovea?

The pterygoid fovea is a small depression on the anteromedial surface of the condylar process of the mandible marking the attachment of the inferior belly of the lateral pterygoid muscle.

What is a Pterygoid process?

: a process extending downward from each side of the sphenoid bone in humans and other mammals.

What Innervates medial pterygoid?

Nerve supply

The medial pterygoid muscle is supplied by the medial pterygoid nerve, a branch of the mandibular nerve, itself a branch of the trigeminal nerve (V). This also supplies the tensor tympani muscle and the tensor veli palatini muscle.

Is pterygoid a skull bone?

The pterygoid is a paired bone forming part of the palate of many vertebrates, behind the palatine bones. It is a flat and thin lamina, united to the medial side of the pterygoid process of the sphenoid bone, and to the perpendicular lamina of the palatine bone.

Where does the pterygoid plexus drain into?

The pterygoid plexus of veins becomes the maxillary vein. The maxillary vein and the superficial temporal vein later join to become the retromandibular vein. The posterior branch of the retromandibular vein and posterior auricular vein then form the external jugular vein, which empties into the subclavian vein.

How do pterygoid muscles work?

The medial pterygoid muscle functions to assist with elevation and protrusion of the mandible. It also assists the lateral pterygoid muscle with side to side mandibular motion to help with the grinding of food.

What bone is the Pterygoid plate on?

The pterygoid processes or pterygoid plates are paired posteroinferior projections of the sphenoid bone.

What is the pterygoid region?

The pterygoid fossa is an anatomical term for the fossa formed by the divergence of the lateral pterygoid plate and the medial pterygoid plate of the sphenoid bone.

What muscle lowers the mandible?

Muscles that depress the mandible and thus open the jaw include the anterior digastric, mylohyoid, and inferior head of the lateral pterygoid. Jaw-closer muscles consist of the masseter, temporalis, medial pterygoid, and superior head of the lateral pterygoid.

What is lateral Pterygoid?

The lateral pterygoid or external pterygoid is a muscle of mastication with two heads. It lies superiorly to the medial pterygoid.

What is Ramus of mandible?

The rami are two vertical processes located on either side of the body; they join the body at the angle of the mandible. At the superior aspect of each ramus, the coronoid and condylar processes articulate with the temporal bone to create the temporomandibular joint which permits mobility.

What causes medial pterygoid pain?

Chewing gum, grinding teeth, and eating tough chewy food are repetitive actions which require constant activation through this muscle. Emotional tension and stress from everyday life can also cause muscle tension to build and lead to the development of trigger points in this muscle.

Where is the ethmoid?

The ethmoid bone is a cube-shaped bone located in the center of the skull between the eyes. It helps form the walls of the eye socket, or orbital cavity, as well as the roof, sides, and interior of the nasal cavity.

What is spine of sphenoid?

[TA] a posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so named for its proximity to this spine; gives attachment to the sphenomandibular ligament.

Where is optic foramen?

The optic foramen, the opening through which the optic nerve runs back into the brain and the large ophthalmic artery enters the orbit, is at the nasal side of the apex; the superior orbital fissure is a larger hole through which pass large veins and nerves.…

What is infratemporal fossa?

The infratemporal fossa is a complex space of the face that lies posterolateral to the maxillary sinus and many important nerves and vessels traverse it. It lies below the skull base, between the pharyngeal sidewall and ramus of the mandible.

What is TMJ capsule?

Capsule - The capsule is a fibrous membrane that surrounds the joint and attaches to the articular eminence, the articular disc and the neck of the mandibular condyle. ... The disc articulates with the mandibular fossa of the temporal bone above and the condyle of the mandible below.

What is Pterygopalatine fossa?

The pterygopalatine fossa (PPF) is a cone-shaped depression deep to the infratemporal fossa and posterior to the maxilla on both sides of the skull. The fossa is located between the pterygoid process and the maxillary tuberosity, close to the orbital apex.